Some of our wholesale lenders are willing to close a conventional loan for you without any physical supporting documentation.
If you are salaried and your payroll provider is part of the system they can verify your income directly.
If your bank is part of the system they can verify your deposits directly. (Requires you to sign onto your online banking inside their portal)
Jumbo loans and more exotic offerings still require that you provide or upload your documentation, but it is a nice time-saver for people who qualify.